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Colour filters are materials that will allow only certain colours of light to pass.a. What is the colour of the filter that can transmit blue and red colours of light?b. Which are the radiations that will be absorbed completely by an infrared filter?c. Write down: (i) Two specialities of infrared rays (ii) Two uses of infrared rays |
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Answer» a. Magenta b. Visible light, ultra violet radiations c. (i) Higher wavelength than that of visible light; becomes the reason for the heat. of the sunlight. (ii) Used to take photograph of distant objects, remote sensing, secret signaling, for controlling robots. |
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